<!doctype html>
<html>

	<head>
		<meta charset="utf-8">
		<title></title>
		<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
	</head>

	<body>
		<script type="text/javascript">
			var str = new String('dddd');
			str['3'] = 'e';
			var s = 'dddd';
			var arr = [1,2,3,4];
			arr.length = 3;
		</script>
	</body>

</html>
